An evaporation leakage checking system includes a pump, a pump passage unit, a tank passage unit, a specified passage unit, an atmosphere passage unit, a flow-passage area changing unit, an atmosphere valve unit, a pressure sensing unit, and a control unit. The control unit includes a calculating unit that calculates a leakage threshold, based on a first pressure, a first area, an Nth pressure, an Nth area, and a reference area that is predetermined, and a leakage checking unit that activates the pump, closes the atmosphere passage unit by changing the flow-passage area of the atmosphere passage unit by using the atmosphere valve unit, and checks the existence of the evaporation leakage based on the leakage threshold and a checking pressure that is the pressure sensed by the pressure sensor in a case where a communication between the tank passage unit and the pump passage unit is allowed.


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    Titel :

    Evaporation leakage checking system and checking method of evaporation leakage using the same


    Beteiligte:
    KANEKO MAKOTO (Autor:in) / KATO YASUO (Autor:in)

    Erscheinungsdatum :

    2019-03-19


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen



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